montanaman

Hey guys, has anybody here put a Limited Slip in the front pumpkin on their 2011 & newer F150 5.0 with electric steering ?


I'd love to have a True-Trac in the front as well as in the back, but I'm wondering if the 'new' electric power steering is up to it.


Anybody done it yet ?

F-250,LD

The first question is, Why?

Any traction device in the front can cause major understeer issues.
Even worse in slick situations.

ccwbrd

We have one in a work truck that have nearly 98,000 miles with one in the front. No problems. Remember the hubs are unlocked in 2wd.

mechanicboy

Right, most people don't know these have hubs because they're inboard so they don't see it.

The raptor has a torsen front diff, I'm should it'd bolt right into ours.

montanaman

"The raptor has a torsen front diff, I'm should it'd bolt right into ours. "

Yup, but the Raptor has a 6.2 with a power steering pump, not the electric steering.


The answer to the "Why?" question, is because the front differential is open on these trucks, meaning that in stock form 4WD, you have one wheel pushing in the back, and one wheel pulling in the front, and a traction control system hitting the brakes.


With a LS rear you have 3 wheels providing power, and if I had a helical gear LS in the front I would have 4 wheels providing power, like an AWD car on steroids.

Logan24

I'm pretty sure when 4x4 is active the front wheels are NOT open. If I throw 4x4 on with dry pavement it binds like crazy. If it were open this wouldn't happen. Kinda silly thinking only 2 wheels are doing the work while in 4x4. That truck would get stuck so easily. When I'm in 4x4 with my rear diff locked. All 4 tires spin in the mud or in the snow. Every time.

Thanks for the laugh tho. That's the silliest thing I've heard today.

Al Kohalic

No, the one wheel spin control works up front too. It pretty much acts like a LSD in the front, but can send more torque to one wheel that a mechanical LSD can. However if you still feel the need to get LSD in the front I would get a TrueTrac. Call Eaton up and check to see if TrueTrac for the old 8.8 inch 28 spline can work with these newer trucks that are also 8.8 inch and 28 spline. Some web sites say that are the same and offer the same parts for both, but I am nt 100% if they are or not.

Al Kohalic

He is right, we all have an open diff in the front unless you have a Raptor with Torsen. The bind you are feeling is because the center diff being locked and the front and rear axles/tires are not turning at the same rate causing them to bind. Although, you do have one wheel spin control as I have stated above that acts like limited slip to brake the wheel that is spinning to send it to the tire that has traction. The main purpose of the system is to keep each side to side wheel spinning at the same rate of speed and will kick in when they don't. Although constant lifetime use of this system can cause uneven brake wear and extreme situations run the risk of the brakes overheating because they are constantly being used for hours on end. After a cool down period then they can be used again. The truck should let you know if you ever get to that point.

mikelytle1077

2012 and later models properly equipped come with an electronic limited slip feature that applies the abs to the wheels that have less traction. not the best setup but it does help a bunch

ccwbrd

Funny, this is the funniest thing I have read all day.....unless you have a Raptor, your front diff is open no question/joke about it.